45641

Properties

Appears in sequences

• a(n) = T(2n-1,n-2), T given by A026670. Also T(2n-1,n-2) = T(2n,n+2), T given by A026725 and T(2n,n-2), T given by A026736.at n=7A026675
• Number of partitions in parts not of the form 21k, 21k+3 or 21k-3. Also number of partitions with at most 2 parts of size 1 and differences between parts at distance 9 are greater than 1.at n=46A035981
• Primes p such that reversal(p) - 13 is a square.at n=36A176371
• Number of subsets of {1, 2, ..., n} containing n and having <=7 pairwise coprime elements.at n=36A186991
• Indices of positive Fibonacci numbers whose binary expansions have record numbers of consecutive zeros.at n=14A218076
• a(n) is the largest number such that every subsequence of digits of the number written in base n is prime.at n=35A282509
• Number of weakly unimodal compositions of n in which the greatest part occurs exactly four times.at n=44A320315
• Primes p such that 2*p+1 and (2*p)^2+(2*p+1)^2 are also prime.at n=43A347110
• Prime numbersat n=4730